2 results about "Rabi frequency" patented technology

This invention discloses an automatic calibration method for logic gates based on a neutral atom quantum computing system, and also discloses an automatic calibration method for logic gate fidelity based on a neutral atom quantum computing system. The method performs self-calibration on the fidelity of a two-qubit gate, including 420nm laser pointing self-calibration, 1013nm laser pointing self-calibration, Rydberg excitation Rabi frequency self-calibration, and single-photon Rabi frequency self-calibration; then it performs self-calibration on the ORMD waveform and ORMD phase; and finally, it performs self-calibration on the fidelity of an addressing single-qubit gate, including 795nm Raman light pointing self-calibration and single-qubit gate Rabi frequency self-calibration. This invention performs parameter self-calibration at fixed intervals to ensure that the logic gate fidelity remains at a high level. Without involving the installation of additional high-resolution laser position detectors, it uses a fully automated process to calibrate the fidelity of quantum logic gates, saving space in the physical system and the manpower costs required for calibration.

This invention discloses a method, system, device, and storage medium for suppressing energy level leakage, relating to the field of quantum information processing. The method applies parametric modulation to qubits to establish and activate effective exchange coupling between qubits under dispersive coupling conditions, thereby performing a two-qubit entanglement gate operation. During the gate operation, a computational subspace control model and an energy level leakage model are constructed by performing representational and unitary transformations on the system's Hamiltonian. Based on these models, the entanglement gate control pulse is optimized. The energy level correction introduced by the parametric driving is dynamically compensated through modulation of the effective Rabi frequency of time-shaping and time-dependent detuning parameters, thus suppressing energy level leakage from the computational subspace to higher energy levels. Compared with existing technologies, this invention improves the controllability and fidelity of entanglement gate operations under complex energy level structures and is applicable to quantum operations in modular quantum systems.